Carbon-shearing and compression device for internal-combustion engines



H. H. GOVE- CARBON SHEARING AND COMPRESSION DEVICE FOR INTERNALCOMBUSTION ENGINES.

APPLICATION FILED DEC.28, I917.

1,349,757. Patented Aug- 17, 1920.

five-vita? AAM /IKM UNITED STATES PATENT. OFFICE.

HENRY H. GOVE, OF BIDDEFORD, MAINE, ASSIGNOR TO GOVE MOTOR COMPANY, OF

BIDDEFORD, MAINE, A CORPORATION OF MAIIiNE.

CARBON-SHEARING AND COMPRESSION DEVICE FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent. Patented A111. 17, 1920.

Original application filed April 10, 1914, Serial No. 830,906. Dividedand this application filed December 28, 1917. Serial N0.209,216.

T 0 all whom it may concern:

Be it known that I, HENRY H. Grove, a

Carbonhearing and Compression Devices for Internal-Combustion Engines,of which the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

My present invention is a combined carbon shearing and compressionpacking intended for use in any part of a machine, where the functionsof carbon shearing and tight packing are desirable, particularly in theconstructions of internal combustion engines. While my invention is ofparticular value in connection with rotary valves for internalcombustion engines, it is not limited to such valve use, but may beadvantageously utilized in any construction where a rotating member isdesigned andadapted to fit into a casing,and particularly where apacking device is requisite in such rotatable construction. i

My present application a divisional from my copending case Ser. No.830,906,filed April 10, 1914., upon a rotary valve for internalcombustion engines, so far as the subjectmatter in common is contained,I having claimed such carbon shearing and comprestion device incombination with the rotary,

In my later copendvalve therein shown. ing application, Ser. No. 97,458,filed May 15, 1916, I have shown, described and claimed the particulartype of carbon shearing and compression devlce in a rotary valveconstruction for internal combustion engines, having the special form ofcross-bar and ring connections therein illustrated. In my presentapplication, I have elected to claim, broadly, the carbon shearing andcompression device illustrated in said two prior applications, withoutlimiting the same to the valve construction shown and explained. by saidcopending applications,having discovered that this device is suitablefor and applicable to a large number of uses, in addition to thoseillustrated in said prior applications. i i t In my development ofinternal combua tion engines and rotary valves therefor, as shown by myPatent No. 1,249,066, and said two copending applications, I have foundthat one of the principal difficulties to be enof the utmost importanceto provide means,

preferably automatic, which shall remove any carbon coating formed inthe bearings, or between moving parts, and preferably to provideautomatic means which will pre vent such a coating from forming. It isthe object of the present invention to both prevent and remove anycarbon deposit from forming, or when formed, between the bearings in anengine. Numerous points in by drocarbonengine construction are open forthe utilization of my automatic carbon shearing device. In the enginecylinder, in the valves thereto, and particularly in the exhaustpassage, or passages from a cylinder, the coating of carbon is mostliable to occur. 7 i i I believe it to be broadly new in an internalcombustion engine, to provide automatic means specially designed toprevent carbon forming and if formed, to remove the same, during thecontinuous operation of the en giuc, and therefore I wish to claim thisfeature broadly. In carrying out my present invention, I provide aplurality-preferably twoinherently expansible members, uniting themfirmly and rigidly by a crossbar or member having thereon a carbonshearing edge, corner, or equivalent means, said cross bar being heldand positioned against the bearing surface on which carbon may form, bythe automatic action of the expansible members. I may have a pluralityof such crossbars carrying carbon shearing means, but I find that onesuch member is usually suiiicicnt.

I find itzulvisable to have the entire carbon slcariug device housed insuitable recesses within a movable part of the engine construction sothat the device will. be moved across therelatively fixed bearingsurface from which. the carbon is to be removed, as will be furtherexplained.

Referring the the drawings, illustrating preferred embodinien of theinvention,

Figure 1. is a perspective view of the carbon shearing and compressiondevice;

Fig. 2 being a fragmentary perspective of a portion of a rotary valvesleeve having recesses adapted to 7 receive the device of Fig. l;

Fig. 3 is a perspective view of a modified form of a device; and

Fig. t is a similar view of a still further modified form having aplurality of cross memiers. I

The particular application of my novel form of carbon shearing andcompression device, herein illustrated, is adapted to be utilized with arotary valve sleeve, the illustrations of Figs. 1 and 2 corresponding toFigs. 4 and 3 respectively of said prior application 830,906, of whichthe present is a. divisional, so far as this form is shown; Fig. 3corresponding to Fig. 4 of said prior application 97,458; but I do notwish to be limited, in the present invention, to the devices appliedonly to the rotary valve, as in my saidprior copending applications, asI believe that this device is applicable to other constructions than therot; ry valve arrangements in my said two applications.

As shown in Fig. 1, the combined carbon shearing and compression devicecomprises .a pair of inherently expansible ringlike and to preventtheforming, of any carbon or other deposit thereon. I prefer to arrangefora relative movement of this device 1n connection with a rotarymember,

such as the fragmentary valve or sleeve, shown in Fig. 2, whichcomprises the member 6 having ports 7 and S into interior passages, onebeing illustrated at 9 to receive the fuel supply, an exhaust portextending entirely through, or through a further concentric sleevewithin the member 6,

as fully shown and explained in my said prior applications; Formed inthe outer surfaces 10 of th1s valve 6 are suitable re cesses 11 and 12for the rmghke members 1and'2 respectively, and a cross recess 13 toreceive the cross bar 4 of said device. These recesses are formed ofsubstantially equal or slightly greater depth than the thickness ofmetal inthe members 1, 2 and 4:, permitting them tohave a certain amountof play or yield, and to permit the expansible members 1 and 2 acting tonormally force or hold the cross-bar 4 out- Wardly, as well aspermitting the members edge 13 being held outwardly and npwardlv withthe crossbar 22 at the end of the rings 1 and 2 to expand outwardlyagainst the walls of the casing within which the valve (3 may rotate.This constructimi permits the edge 5 to be forced upwardly andoutwardly, and to rotate with the valve ti, thus positively scraping thefixed bearing walls in the casing for said valve (3, and removing thecarbon deposit or any other foreign matter therefrom, preventing thevalve from sticking, insuring ease of rotation. and furthermore actingas a compression tight device around the valve walls and particularlyadjacent the ports T and R. in Fig. 3 a slightly ditlerent type ofcarbon shearing and compression device is illustrated, wherein thering-like members o .and 16 are united by a cross bar 17 at one end ofthe split portions of said rings. the

in a somewhat more eiticient carbon shearing manner than the form shownin Fig. l. The crossbar 17 may have said edge In thereupon, or a ridgeformed thereon as a carbon shearing means, if desired, although I findthat in practice, the normally expansible ringlike members are quitesutiicient: to hold the square cornered edge 18 of the cross baroutwardly at a sutlicient angle to clear the carbon or other depositfrom the adjacent bearing surfaces.

In Fig. 4t I have shown such a device with the ringlike members 20 and2t united by two crossbars 22 and 23, thus having all the advantages ofa double carbon shearing and compression packing device, preferablywhere same are split, similar to that shown in Fig. 3, and with thecross-bar 2 3 diametrically opposite the split portion as shown in Fig.l.

A further desirable feature of this construction consists in thefacility for distribution of lubricating oil. a supply of the same beingreadily retained in the recesses 11, 12 and 13 and carried anddistributed around the adjacent bearing parts through the gradual usingup of oil, said recesses constituting a. considerable reservoir and thepacking device in effect acting as a re taining means or cover therefor.

It will be readily appreciated that l have devised a constructionsuitable for use between the bearings in many ditferent points in anengine, where carbon or other deposit is apt to be formed, whichconstruction automatically prevents the accumulation of .carbon orforeign deposits on the bearing surfaces, the special design of carbonshearing member carried by and positioned through the normal expansibleaction of the ringlike members forcing the same to scrape and removecarbon from the bearing surface with which it contacts, while alsoconstituting a tight packing therefor and a dis tribution means andlubrication reservoir.

My invention is further described and defined in the form of claims asfollows:

1. Means for preventing the formation of carbon between the bearingparts of internal combustion engines, comprising a connecting means, acarbon shearing edge thereon, an inherently expansible split ringmounted at each end of said connecting means, a connection between saidrings and said connecting means being adjacent the split in the rings,the split being in substantial alinement with the carbon shearing edgewhereby said carbon shearing edge is yieldingly held outwardly inoperatlve po sition.

2. A carbon shearing device for internal combustion engines, comprisingan expansible split ring, a bar attached thereto at right anglestherewith, one side of said bar.

being in alinement with the split in said ring and a carbon shearingedge in the side of the bar in alinement with the split and in alinementwith the periphery of said ring, whereby the shearing edge is forcedoutwardly tangentially of the split ring to hold said edge in operativeposition.

The combination, with an internal combustion engine, of means to preventthe accumulation of carbon 01' the like on the bearing surfaces,consisting in a plurality of inherently expansible split rings, aplurality of cross bars uniting said expansiblerings, and a carbonshearing edge on one of said cross bars in alinement with the split insaid rings.

I11 testimony whereof I have signed my name to this specification.

HENRY H. GOVE.

